It's the Lego Batman trailer!
Thanks, Gametrailers - unlike criminals, you are not a cowardly and superstitious lot.
Not giving much away, eh? That's The Batman for you though - all shadowy and mysterious, keeps his cards close to his impeccably-toned chest'n'all. And, of course, there probably isn't all that much to give away anyway. We can guess pretty much what to expect from this - punch, build, jump, grapple-hook, giggle. Much as I'm tickled by the concept, I think I need to see something that proves this is a little more than Lego Star Wars but with frowning before I get excited - especially with the similarly punch'n'grappley Lego Indiana Jones also on the toy-to-game horizon.